Anomalous liquid crystal undershoot effect resulting in a nematic liquid crystal‐based spatial light modulator with one millisecond response time

1992 ◽  
Vol 61 (8) ◽  
pp. 883-885 ◽  
Author(s):  
Keyvan Sayyah ◽  
Chiung‐Sheng Wu ◽  
Shin‐Tson Wu ◽  
Uzi Efron
Keyword(s):  
Liquid Crystal ◽  
Response Time ◽  
Nematic Liquid Crystal ◽  
Spatial Light Modulator ◽  
Light Modulator

Optimal trap velocity in a dynamic holographic optical trap using a nematic liquid crystal spatial light modulator

2022 ◽  
Author(s):  
Karuna Sindhu Malik ◽  
Bosanta Ranjan Boruah
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Spatial Light Modulator ◽  
Optical Trap ◽  
Optical Element ◽  
Optical Traps ◽  
Light Modulator ◽  
Step Size ◽  
Microscopic Object ◽  
Optimal Velocity

Abstract A dynamic holographic optical trap uses a dynamic diffractive optical element such as a liquid crystal spatial light modulator to realize one or more optical traps with independent controls. Such holographic optical traps provide a number of flexibilities and conveniences useful in various applications. One key requirement for such a trap is the ability to move the trapped microscopic object from one point to the other with the optimal velocity. In this paper we develop a nematic liquid crystal spatial light modulator based holographic optical trap and experimentally investigate the optimal velocity feasible for trapped beads of different sizes, in such a trap. Our results show that the achievable velocity of the trapped bead is a function of size of the bead, step size, interval between two steps and power carried by the laser beam. We observe that the refresh rate of a nematic liquid crystal spatial light modulator is sufficient to achieve an optimal velocity approaching the theoretical limit in the respective holographic trap for beads with radius larger than the wavelength of light.

Study of Response Time Depending on Driving Voltage of Liquid Crystal Spatial Light Modulator

2013 ◽  
Vol 50 (9) ◽  
pp. 092302
Author(s):  
Qi Mengjiao ◽  
Wang Qidong ◽  
Mu Quanquan ◽  
Liu Yonggang ◽  
Yao Lishuang ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Response Time ◽  
Spatial Light Modulator ◽  
Driving Voltage ◽  
Light Modulator

Response Time of a-Si:H Photosensors in Optically Addressed Spatial Light Modulators

1991 ◽  
Vol 219 ◽  
Author(s):  
Garret Moddel ◽  
Pierre R. Barbier
Keyword(s):  
Liquid Crystal ◽  
Response Time ◽  
Spatial Light Modulator ◽  
Reverse Bias ◽  
Forward Bias ◽  
Spatial Light Modulators ◽  
Photocurrent Response ◽  
Light Modulator ◽  
Double Injection ◽  
Light Modulators

ABSTRACTA successful application for a-Si:H is as the photosensor in a liquid crystal optically addressed spatial light modulator (OASLM). We analyze the response time of an a-Si:H p-i-n photodiode in a “pseudo-OALSM,” in which the liquid crystal is replaced by an equivalent capacitor, under both forward and reverse bias. Under reverse bias the two important effects are the photocurrent response time, and residual trapped charge. Under forward bias the mechanism shifts from double injection regimes to ohmic transport as a function of voltage. We relate these characteristics to the operation of an OASLM.

A new class of spatial light modulator using a crosslinkable azobenzene nematic liquid crystal

2000 ◽  
Vol 11 (8-12) ◽  
pp. 579-582
Author(s):  
San-Seong Seomun ◽  
Takashi Fukuda ◽  
Hiro Matsuda ◽  
Hiroshi Miyachi ◽  
Masao Kato
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Spatial Light Modulator ◽  
Light Modulator ◽  
New Class

Diffraction efficiency analysis of a parallel-aligned nematic-liquid-crystal spatial light modulator

1994 ◽  
Vol 33 (14) ◽  
pp. 2804 ◽  
Author(s):  
Naohisa Mukohzaka ◽  
Narihiro Yoshida ◽  
Haruyoshi Toyoda ◽  
Yuji Kobayashi ◽  
Tsutomu Hara
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Diffraction Efficiency ◽  
Spatial Light Modulator ◽  
Efficiency Analysis ◽  
Light Modulator
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